The Safety Case
The breeder's safety case centers on tritium containment, neutron and activation management, and magnet energy, matched to a byproduct-material framework.
What must be made safe
A fusion breeder's hazards are specific and bounded: radioactive tritium, neutron activation of materials, and the stored energy in high-field magnets. The safety case addresses these directly. It is not the accident spectrum of a fission core, which is why a byproduct-material framework fits the machine.
The main hazards
- Tritium: a radioactive gas requiring containment and accountancy
- Neutron activation: components become radioactive and need shielding and handling
- Magnet energy: stored energy managed through quench protection
- Occupational and public dose around a compact neutron source
How they are addressed
Tritium is contained by multiple barriers and tracked by accountancy. Activation is managed by shielding, material choice, and remote maintenance. Magnet energy is handled by quench protection. Dose is managed by shielding and access control. Each hazard has a designed control, and the gates produce evidence, especially G3's tritium accountancy, that supports the case.
Inherent characteristics
A fusion plasma is not a chain reaction; it stops when fueling or heating stops, and it holds very little fuel at any instant. This gives the safety case favorable inherent characteristics, though tritium and activation still require rigorous control and are the focus of the licensing basis.
The safety case is developed for a machine not yet built or licensed, in pre-application engagement with the regulator, with formal submissions governed by counsel review.